Enhanced photocatalytic degradation of 2-thiobenzimidazole by the tris(8-quinolinolato)cobalt(iii) complex through peroxide adduct formation: theoretical and experimental investigations
Abstract:HOMO–LUMO influenced photocatalytic degradation of 2-thiobenzimidazole through a thermodynamically favored route has been achieved by the cobalt(iii) Schiff base complex.
“…The solid-state 1 exhibits three absorption peaks at 244, 281, and 347 nm in the UV region (Figure S15). The bands centered at 244 and 281 nm are corresponding to the intraligand transitions of the 2-TBI ligand, , while another band is attributed to the mixture of ligand-to-metal charge transfer (LMCT) and Ag···Ag interactions . Furthermore, 1 shows broadband luminescence emission with a maximum peak at 544 nm upon excitation at 350 nm at room temperature (Figure S16).…”
Polynuclear
silver clusters have attracted intensive attention
in the academic community owing to their rich physicochemical properties.
The development of thione-protected silver clusters has been lagging
behind the well-explored thiolate-protected silver-sulfide clusters.
Herein, we report two N-heterocyclic thione-protected
silver clusters: [Ag4(2-TBI)6(SO4)3]2– (Ag4
)
and [Br@Ag8(2-TBI)12(SO4)2]3+ (Ag8
) (2-TBI = 2-thiobenzimidazol),
which cocrystallize to form cluster-based molecular crystals with
a CaF2-type structure. The cocrystal shows high thermal
stability in air. Notably, the two cluster-based layers are alternately
assembled to exhibit a unique k-vector-differential
crystallographic arrangement. This work may lay a foundation for synthesis
of atomically precise and stable silver clusters using readily available N-heterocyclic thione ligands.
“…The solid-state 1 exhibits three absorption peaks at 244, 281, and 347 nm in the UV region (Figure S15). The bands centered at 244 and 281 nm are corresponding to the intraligand transitions of the 2-TBI ligand, , while another band is attributed to the mixture of ligand-to-metal charge transfer (LMCT) and Ag···Ag interactions . Furthermore, 1 shows broadband luminescence emission with a maximum peak at 544 nm upon excitation at 350 nm at room temperature (Figure S16).…”
Polynuclear
silver clusters have attracted intensive attention
in the academic community owing to their rich physicochemical properties.
The development of thione-protected silver clusters has been lagging
behind the well-explored thiolate-protected silver-sulfide clusters.
Herein, we report two N-heterocyclic thione-protected
silver clusters: [Ag4(2-TBI)6(SO4)3]2– (Ag4
)
and [Br@Ag8(2-TBI)12(SO4)2]3+ (Ag8
) (2-TBI = 2-thiobenzimidazol),
which cocrystallize to form cluster-based molecular crystals with
a CaF2-type structure. The cocrystal shows high thermal
stability in air. Notably, the two cluster-based layers are alternately
assembled to exhibit a unique k-vector-differential
crystallographic arrangement. This work may lay a foundation for synthesis
of atomically precise and stable silver clusters using readily available N-heterocyclic thione ligands.
“…62 The coordination of water molecules with Fe(III) was confirmed by the FTIR signal at 600 cm À1 . 63 The appearance of a broad peak at around 2160-1978 cm À1 originated from the n[M-O] and n[M-N] vibrations as the characteristic of the metal coordination with the Schiff base ligand and confirms the involvement of the nitrogen and oxygen atoms of azomethine and phenolic (-OH) groups. Also, there was a red shift in the CQN stretching vibration, which was detected for the ligand at 1610 cm À1 and shifted to 1592 cm À1 for the complex due to a shift of the azomethine nitrogen lone pair density toward the metal ion during the coordination of the metal ion.…”
This paper reports the synthesis and characterization of metal complexes of Fe(III), Co(II), and Cu(II) with SALPHEN (N,N-bis(salicylimine)-o-phenyldiammine), and their potential application as sensitizers in dye-sensitized solar cells (DSSC). A...
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